Residual current monitor RCMA423 - Bender Benelux BV

Dipl.-Ing. W. Bender GmbH & Co. KG • Londorfer Str. 65 • 35305 Grünberg • Phone: 06401 807-0 • Fax: 06401 807-259Residual current monitorRCMA423AC / DC sensitive residual current monitorfor TN and TT systems(AC, DC and pulsating DC currents)4.2RCMA423Device features• AC / DC sensitive residual current monitorType B according to IEC 62020 and IEC 60755• r.m.s. value measurement (AC + DC)• Two separately adjustable responsevalues 30 mA…3 A• Frequency range 0…2000 Hz• Start-up delay, response delay and delayon release• Digital measured value display via LC display• Measured value memory for operating value• CT connection monitoring• Power On LED, LED Alarm 1, LED Alarm 2• Internal / external test / reset button• Two separate alarm relays(one changeover contact each)• N / O or N / C operation and fault memorybehaviour selectable• Continuous self monitoring• Multi-functional LC display• Password protection for device settings• Sealable transparent cover• Push-wire terminal(two terminals per connection)• Two-module enclosure (36 mm)Product descriptionThe AC / DC sensitive residual current monitor RCMA423 is designed for monitoring earthedpower supply systems (TN and TT systems) where smooth DC fault currents or residual currentscontinuously greater than zero may occur. These are in particular loads containing six-pulserectifiers or two-pulse rectifiers with smoothing, such as converters, battery chargers, constructionsite equipment with frequency-controlled drives. Currents in single conductors canalso be monitored by RCMA423.The prewarning stage (50…100 % of the set response value I Δn2) allows to distinguish betweenprewarning and alarm. Since the values are measured with measuring current transformers,the device is nearly independent of the load current and the nominal voltage ofthe system.Applications• AC / DC sensitive residual current monitoring in earthed two, three or four conductorsystems (TN and TT systems)• Monitoring of variable-speed drives, UPS systems, construction site equipment, printingmachines, battery systems, laboratory equipment, wood working machines, MF weldingsystems, furniture industry, medical electrical equipment, etc.• AC / DC sensitive current monitoring of single conductors de-energised under normalconditions (e. g. N and PE conductors)FunctionOnce the supply voltage U S is applied, the start-up delay is activated. Measured values changingduring this time do not influence the switching state of the alarm relays.Residual current measurement takes place via an external W20AB…W210AB series measuringcurrent transformer. The currently measured value is shown on the LC display. In this wayany changes, for example when circuits are connected to the system, can be recognised easily.If the measured value exceeds the set response values, the response delays "t on1/2" begin.Once the response delay "t on1/2" has elapsed, the "K1 / K2" alarm relays switch and the alarmLEDs "AL1 / AL2" light up. If the current falls below the release value (response value plushysteresis), the release delay "t off“ begins. When "t off“ has elapsed, the alarm relays return totheir initial position and the alarm LEDs AL1 / AL2 go out. If the fault memory is activated,the alarm relays remain in the alarm state and the LEDs light until the reset button is pressedor until the supply voltage is interrupted. The device function can be tested using the testbutton. Parameters are assigned to the device via the LCD and the control keys on the frontof the device and can be password-protected.Connection monitoringThe function of the device and the CT connections are continuously monitored. In the eventof a fault, the alarm relays K1 / K2 switch without delay, the alarm LEDs AL1 / AL2 / ON flash.On removal of the fault, the alarm relays return to their initial position either automaticallyor by pressing the reset button.44 TDB404010en / Main catalogue part 4 – Residual current monitors, Residual current monitoring systems / 04.2010Subject to change ! – © Dipl.-Ing. W. Bender GmbH & Co. KG, Germany

Residual current monitor RCMA423Operating and display elements123Wiring diagram4214.256 71 - Power On LED "ON" (green); lights when supply voltage is appliedand flashes in the event of system fault alarm respectively in theevent of CT malfunction2 - Alarm LED "AL1" (yellow), prewarning; lights when the set responsevalue I Δn1 is exceeded or flashes in the event of systemfault alarm respectively in the event of CT malfunction3 - Alarm LED "AL2" (yellow), alarm; lights when the set responsevalue I Δn2 is exceeded or flashes in the event of system faultalarm respectively in the event of CT malfunction4 Multi-functional LC display5 - Test button "T": start self testUp key: change parameters, move upwards in the menu6 - Reset button "R": delete saved alarmsDown key: change parameters, move downwards in the menu7 - "MENU" key: call menu systemEnter key: confirm parameter changeESC key: press the key > 1.5 seconds5341 - Supply voltage U S see ordering information(6 A fuse (recommended)2 Connector for the external W20AB…W210AB series measuringcurrent transformer3 - Alarm relay K1: IΔn1 (prewarning)4 - Alarm relay K2: Alarm I Δn2 (alarm)5 - Combined test and reset button "T / R"short-time pressing (< 1.5 s) = RESETlong-time pressing (> 1.5 s) = TESTDo not route the PE conductor through the measuring currenttransformer!TDB404010en / Main catalogue part 4 – Residual current monitors, Residual current monitoring systems / 04.2010 45

4.2Residual current monitor RCMA423Connection of measuring current transformersDimension diagram XM420Dimensions in mmOpen the front plate cover indirection of arrow!Screw fixingNote: The upper mounting clipmust be ordered separately(see "Accessories").Connection to the RCMA423 residual current monitor using the WX-…connecting cable.Colour coding for WX…: k = yellow, l = green, -12 V = black,GND = brown, +12 V = red, test (T) = orangeResidual operating current rangesof the different measuring current transformersResidual operating current rangesArt. No.30 mA…500 mA W20AB30 mA…3 A W35AB; W60AB; W120AB300 mA…3 A W210AB46 TDB404010en / Main catalogue part 4 – Residual current monitors, Residual current monitoring systems / 04.2010

Residual current monitor RCMA423Technical dataInsulation coordination acc. to IEC 60664-1 / IEC 60664-3Rated insulation voltage250 VRated impulse voltage / pollution degree2.5 kV / IIIProtective separation (reinforced insulation) between(A1, A2) - (k / l /- / 0 / +, T / R) - (11, 12, 14) - (21, 22, 24)Voltage test according to IEC 61010-12.21 kVSupply voltageSupply voltage USsee ordering informationPower consumption≤ 6,5 VAMeasuring circuitExternal measuring current transformer W20AB, W35AB, W60AB, W120AB, W210ABRated insulation voltage (measuring current transformer)800 VOperating characteristic acc. to IEC 60755Type BRated frequency0…2000 HzMeasuring range AC / DC3 mA…6 ARelative uncertainty from the measured value at f ≤ 2 Hz or ≥ 16 Hz 0…- 35 %Relative uncertainty from the measured value at f > 2 Hz…< 16 Hz - 35 %…+ 100 %Display accuracy, measured value ± 17 %Response valuesRated residual operating current IΔn1 (prewarning) 50…100 % of I Δn2, min. 15 mA (15 mA)*Rated residual operating current IΔn2 (alarm)30 mA…3 A (30 mA)*Hysteresis 10…25 % (15 %)*Specified timeStart-up delay t0…10 s (0 s)*Response delay ton2 (alarm)0…10 s (0 s)*Response delay ton1 (prewarning)0…10 s (1 s)*Delay on release toff0…99 s (1 s)*Operating time tae at IΔn = 1 x IΔn1 / 2 / IΔn = 5 x IΔn1 / 2≤ 180 ms / ≤ 30 msResponse time tan t an = t ae + t on1 / 2Recovery time tb≤ 300 msDisplays, memoryDisplay range, measuring value0…6 AOperating uncertainty0…- 35 % / ± 2 digitMeasured-value memory for alarm valuedata record measured valuesPasswordoff / 0…999 (off)*Fault memory behaviouron / off (on)*Inputs / outputsCable length for external test / reset button0…10 mCable lengths for measuring current transformersSingle wire 6 x 0.75 mm20…10 mConnectionconnectors, WX-… recommendedSwitching elementsNumber of switching elements2 x 1 changeover contactOperating principleN / C operation / N / O operation (N / C operation)*Electrical endurance, number of cycles 10.000Contact data acc. to IEC 60947-5-1Utilisation category AC-13 AC-14 DC-12 DC-12 DC-12Rated operational voltage 230 V 230 V 24 V 110 V 220 VRated operational current 5 A 3 A 1 A 0.2 A 0.1 AMinimum contact rating1 mA at AC / DC ≥ 10 VEMCEMC IEC 62020: 2003-11Operating temperature - 25 °C…+ 55 °CClimatic class acc. to IEC 60721Stationary use (IEC 60721-3-3)3K5 (except condensation and formation of ice)Transport (IEC 60721-3-2)2K3 (except condensation and formation of ice)Long-time storage (IEC 60721-3-1) 1K4 (except condensation and formation of ice)Classification of mechanical conditions IEC 60721Stationary use (IEC 60721-3-3)3M4Transport (IEC 60721-3-2)2M2Long-time storage (IEC 60721-3-1)1M3ConnectionConnection typepush-wire terminalsConnection properties rigid 0.2…2.5 mm2 / AWG 24-14flexible without ferrule 0.2…2.5 mm2 / AWG 24-14flexible with ferrule 0.2…1.5 mm2 / AWG 24-16Stripping length10 mmOpening force50 NTest opening, diameter2.1 mmOtherOperating modecontinuous operationMountingdisplay-orientedDegree of protection, internal components / terminal (DIN EN 60529) IP 30 / IP 20Enclosure materialpolycarbonateFlammability classUL94V-0DIN rail mounting acc. to IEC 60715Screw mounting2 x M4 with mounting clipSoftware versionD330 V1.0xProduct standards DIN EN 62020 (VDE 0663): 2005-11, IEC 62020: 2003-11Operating manual TGH 1442Weight≤ 150 g( )* factory setting4.2Ordering informationTypeResponse FrequencySupplyArt. No.range I Δn rangevoltage U S*RCMA423-D-1 30 mA…3 A 0…2000 Hz DC 9.6…94 V / B 7404 3023AC 42…460 Hz 16…72 VRCMA423-D-2 30 mA…3 A 0…2000 Hz DC 70…300 V / B 7404 3025AC 42…460 Hz / 70…300 VDevice version with screw terminals on request. * absolute valuesMeasuring current transformersType Inside diameter (mm) Art. No.W20AB ø 20 B 9808 0008W35AB ø 35 B 9808 0016W60AB ø 60 B 9808 0026W120AB ø 120 B 9808 0041W210AB ø 210 B 9808 0040Connection cable measuring current transformer – RCMA423-DType Length / m Art. No.WX-100 1 B 9808 0503WX-250 2.5 B 9808 0504WX-500 5 B 9808 0505WX-1000 10 B 9808 0511AccessoriesTypeArt. No.Mounting clip for XM420 enclosure B 9806 0008Snap-on mounting W20…, W35… B 9808 0501Snap-on mounting W60… B 9808 0502(1 unit required for each device)TDB404010en / Main catalogue part 4 – Residual current monitors, Residual current monitoring systems / 04.2010 47